James f



(No ModeL) J. F. GILLILAND.

LINE WIRE FOR MECHANICAL TELEPHONES. 940.

Patented Oct. 6, 1885 I JV VEN TOR;

WITNESSES.

UNITED STATES PATENT ()FFICE.

JAMES F. GILLILAND, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO JOHN B.

' BENNETT, OF SAME PLACE.

LINE-WIRE FOR MECHANICAL TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 327,940, dated October 6, 1885. Application filed November 4, 1882. Serial No. 75,954. (No model.)

To aZZ whom, it may concern:

Be it known that I, JAMES F. GILLILAND, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Line-Wire for Mechanical Telephones, of which the following is a specification.

The object of my said invention is to produce a line-wire for mechanical telephonelines which will transmit speech without at the same time being subject to the ringing or echoing which has usually been a feature of the use of such telephones. This object is accomplished by covering or insulating the wire throughout its whole length with some non-resonant material, and thus muffiing it against outside sounds.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a view of a set of instruments connected by my improved line-wire, Fig. 2, a similar View on an enlarged scale, showing the construction more plainly; Fig. 3, a view of a small portion of the wire on a still further enlarged scale, partly covered in accordance with my invention and partly uncovered; Fig. 4,a similar view,but showing a different style of wrapping or covering, and Fig. 5 a view of one of the insulators or devices by which the line-wire is suspended to the poles, &c., separately.

In said drawings the portions marked A represent the telephones; B, the line-wire; G, the covering therefor, and D D the insulators or means of supporting the wire.

The telephone or telephonic apparatus A may be any mechanical telephone, either with or without a call-signal attachment. The

form shown is the Bennett mechanical telephone and the Gilliland magneto-bell.

The wire B is or may be any ordinary telephone-wire, and extends from one instrument to the other, being supported at intervals upon the hangers or insulators, as shown.

The covering 0 is any suitable non-resonant material,which is wrapped, woven,or braided around the wire B in sufficient quantity to muffle said wire and keep it so far from direct contact with the atmosphere or the devices by which it is suspended as to deaden or interrupt external sounds.

The insulators D are similar to those shown and described in Letters Patent N 0. 296,330, dated April 8, 1884., and will not therefore be further described herein.

Havingthus fully described my said invention, what I claim as new, and desire to secure by Letters Patent,'is

l. A line-wire for mechanical telphones, composed of the ordinary wire covered or wrapped with non-resonant material, whereby the effect of the vibration of said wire and of the wind or atmosphere is counteracted, substantially as set forth.

2. In combination with mechanical telephones, the ordinary line-wire,B, and the nonresonant or muffling covering G,substantially as shown and described, and for the purposes specified.

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 31st day of October, A. D. 1882.

JAMES F. GILLILAND. 

